| In the last nineties of the last century, with the development of computer technology, multimedia technology, electronics technology and software technology, interactive smart board system has become one of multimedia tools used in teaching, meetings, demonstrations, training and so on. It is convenient for people to exchange information with the emergence of the interactive smart board. The operators using the electronic sensor pen on the special smart board can control the computer and realize computer files open, edit, save and other operations, and users get rid of only using mouse, keyboard and screen. Interactive smart board which is matched the appropriate educational software composed of interactive smart board application system with data access, audio, video, images and so on. It has a broad application prospects in primary and secondary schools. If it has network communication capabilities, we can also realize web conferencing and remote education.Interactive smart board system which we designed is based on.electromagnetic induction technology and it is a multimedia tool which is composed of electromagnetic-inducted smart board, electronic sensor pen, projector with a VGA interface, computer systems, coordinate conversion process and application software of interactive smart board. This paper focuses on introducing the coordinate conversion process and application software of interactive smart board on the basis of introducing the principle of electromagnetic-inducted smart board system. This paper introduces the research of the coordinate conversion between electromagnetic-inducted smart board and computer screen mainly. Through research and analysis on several common coordinate conversion algorithms, we found inappropriate and inadequate problems if they are applied on our system. So we put forward a new coordinate conversion algorithm:perspective transformation algorithm. The experiments prove that perspective transformation algorithm has the advantage and feasibility. It also has a strong practical significance in practical engineering applications.In addition, we design and program the application software of interactive smart board which is applied to the primary and secondary education. This paper describes the software's design, program modules and key functions with details.Finally, the paper analyzes the improvement and future of interactive smart board system which is based on electromagnetic induction technology. |
PDF Full Text Request